8.5　　以点（point）类为基类，重新定义矩形类和圆类。点为直角坐标点，矩形水平放置，由左下方的顶点和长宽定义。圆由圆心和半径定义。派生类操作判断任一坐标点是在图形内，还是在图形的边缘上，还是在图形外。缺省初始化图形退化为点。要求包括拷贝构造函数。编程测试类设计是否正确。-8.5 point (point) class is the base class, redefined class and rounded rectangle class. Points for the rectangular coordinates, horizontal rectangle, length and width from the lower left vertex and definitions. Defined by the center and radius of the circle. Derived class action to determine coordinates of any point within the graph or the edge of the graph, or in the graphics outside. Degradation as the default initialization point graphics. Requirements include copy constructor. Programming test class design is correct.